Summary

I’ve been evaluating the Rust blake3 crate for potential use. Data, code, and benchmarks are available here.

Results

• x86: blake3 is consistently faster than blake2.
• ppcle / s390x / aarch64: performance is generally slower than blake2.
  • Rayon parallelism sometimes improves results.
  • In some cases, performance is still worse (example).

Questions

• Is this expected behavior on non-x86 architectures (e.g., SIMD gaps, missing intrinsics)?
• Or is my sample code / benchmarking harness flawed?
• Are there recommended tuning options or build flags for ppcle, s390x, and aarch64?